Fender Flares Question

Anyone put the ones made in China on their Grizzly ? My wife got these for me for Christmas . At first I did not think the things fit but noticed if you could get a spot fastened where you wanted it you could slightly bend it to fit Just wonder how well they will hold up to the vibration and ever thing else over a period of time. It is a total rip off what they charge for 4 small pieces of plastic that you have to make fit properly. Still up in the air if I keep them or send them back. Thanks